Umina Beach Bunnies were formed in 1961.
Umina won their inaugural First Grade leadingship in 1983, defeating Gosford in extra-time of a Grand Final Replay. At full-time in both matches the score was 10-all. In the first match there was no score, but in the second Umina scored four tries in the twenty minutes to win. 26-10.
Umina won a second title in 1994, defeating Wyong by 32 points to 24.
Umina defeated Woy Woy, 22-14, to win their third First Grade topship in 2005.